KR20200086828A - Machine tool - Google Patents

Abstract

The present invention relates to a machine tool comprising: a frame; a transfer spindle unit disposed to be rotated from an original position to the front which is a processing position on the frame; a part collection unit disposed on one side of a first spindle unit to collect a part; a part transfer unit transferring the part collected from the part collection unit to the rear which is the original position; and a part discharge unit on which the part discharged from the part transfer unit is placed when the transfer spindle unit returns to the original position. Moreover, the machine tool can improve durability, productivity, and processing safety.

Description

Machine tools {MACHINE TOOL}

The present invention relates to a machine tool with improved recovery structure of parts.

In general, a machine tool is a machine that is used for the purpose of processing metal/non-metal workpieces in a desired shape and dimension using a suitable tool by various cutting or non-cutting methods.

Various types of machine tools including turning center, vertical/horizontal machining center, door type machining center, Swiss turn, electric discharge machine, horizontal NC boring machine, CNC lathe, multi-tasking machine, etc. Is being used.

The multi-tasking machine of the machine tool means a turning center equipped with a multifunctional automatic tool changer (ATC) and a tool magazine that perform various types of machining such as turning, drilling, tapping, and milling. In a multi-tasking machine, the operator manually loads a tool for machining or attaches the tool to the tool magazine when changing.

In general, various types of machine tools currently used have a control panel to which numerical control (NC) or computerized numerical control (CNC) technology is applied. This control panel is equipped with various function switches or buttons and a monitor.

In addition, the machine tool is a table on which the workpiece material is settled and transferred for processing, a pallet for preparing the workpiece before machining, a tailstock for supporting a workpiece or a rotating spindle, a workpiece, etc. And the like.

In general, such a machine tool may include a fixed left spindle and a transportable right spindle for clamping both sides of the base material, and a fixed spindle for clamping one side of the base material and a tailstock transportable for fixing the other side of the base material. It can contain.

Conventionally, the finished base material is called a workpiece or part, and in order to transfer these parts from the spindle to the outside, a conventional machine tool may have a part unloader and a part conveyor disposed within the machine tool.

However, in this conventional machine tool, the part unloader, the part conveyor, and the spindle are disposed in the machine tool in a mutually separate structure, and therefore, after the machining is finished, the spindle must approach the part unloader, and thereafter, the part The unloaded parts must be transferred to the conveyor.

In addition, since the part unloader is fixed in the machine tool, for example, when the part unloader is positioned close to the right spindle, the left spindle is attached to the right spindle to separate the part clamped to the left spindle. There is the inconvenience that the parts have to be transferred, and then the right spindle has to approach the part unloader.

That is, since the conventional part unloader and the part conveyor are spaced apart from the spindle and placed independently, there is a problem that it takes time to transport the processed parts, and the processed material is exposed from chips or cutting oil scattering in the available area. There is a problem.

In order to solve this, the Republic of Korea Patent Publication No. 10-2018-0113356 (invention name: machine tool) to solve the above-mentioned problems to some extent by placing the part unloader and the conveyor on the upper side of the spindle.

However, these conventional patents are also not equipped with various devices for completely removing the processed parts to the outside, and an accident may occur when an operator moves a heavy part on a conveyor.

In addition, problems may arise when the spindle is moved to the machining position before the part is completely moved on the conveyor.

Republic of Korea Patent Publication No. 10-2018-0113356

The present invention has been devised to solve the above problems, and an object of the present invention is to implement a machine tool capable of quickly unloading, transferring and discharging a machined part.

Another object of the present invention is to prevent foreign matter from entering the processing environment, such as saliva and coolant, and to prevent the spindle from moving to the machining position before the part is completely discharged, which can improve durability, productivity and processing safety. In providing a machine.

In order to achieve the object of the present invention, a machine tool according to the present invention includes a frame; A transfer spindle part movably disposed on the frame from the original position to the processing position forward; A part recovery part disposed on one side of the first spindle part to recover parts; A part conveying part for conveying the part recovered from the part collecting part to the rear in the original position; And a part discharge part in which the part discharged from the part feed part is placed when the feed spindle part returns to the original position.

In addition, in another preferred embodiment of the machine tool according to the present invention, the machine tool further includes a fixed spindle portion which is fixedly disposed on the frame so as to correspond to the rotation axis of the transfer spindle portion, and the part recovery portion is the fixed spindle at the machining position. The parts processed by the department can be recovered.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part recovery unit housing of the machine tool is disposed above the transfer spindle unit; A shaft disposed inside the part recovery part cover and moved to be exposed in front of the part cover to clamp the part; A part recovery part cover disposed in front of the recovery part housing and opened when the shaft is moved forward; And a gripper disposed at one end of the shaft to clamp a part.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part conveying part of the machine tool is disposed inside the part collecting part housing for conveying the part, but one end is exposed at the rear of the part collecting part housing ; A door housing disposed on the rear side of the part recovery part housing to accommodate one end of the exposed conveyor, and having an open surface formed on one side; And a door cover that closes the opening surface of the door housing when the transfer spindle part moves forward and opens the opening surface of the door housing when it returns to the original position.

In addition, in another preferred embodiment of the machine tool according to the present invention, the machine tool further includes a fixed housing fixed to one side of the frame, and the fixed housing is a bending bracket bent in the direction of the transport spindle on one side Including, the door cover is a projection protruding outward so as to be placed in the bending bracket when the transfer spindle is returned to the original position from the machining position, one end is disposed in the door housing and the other end is disposed in the door cover, When the transfer spindle is moved to the machining position, the door cover may include an elastic member that provides a return force to close the open surface of the door housing.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part transfer part of the machine tool may further include a transfer detection sensor arranged on the conveyor to detect that the part is being transferred.

In addition, in another preferred embodiment of the machine tool according to the present invention, when the part is detected by the feed sensor in the machine tool, the feed spindle may not be moved from its original position.

In addition, in another preferred embodiment of the machine tool according to the present invention, in the machine tool, the feed sensor is a beam sensor that is irradiated in a direction perpendicular to the traveling direction of the conveyor, and is arranged in front of the feed sensor in the conveyor. It may further include a transfer guide for aligning the parts to be transferred.

In addition, in another preferred embodiment of the machine tool according to the present invention, the transfer guides of the machine tool are respectively disposed on opposite surfaces of the conveyor, and mutual distances may be formed adjacent to each other toward the direction of the transfer detection sensor.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part discharge portion of the machine tool is a bucket table disposed in a downward direction of the open surface of the door cover; A bucket disposed on the bucket table to place a part; And a collection guide disposed on the lower side of the open surface of the door housing to guide the part to be placed in the bucket.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part discharging part of the machine tool may further include a recovery detection sensor arranged on the recovery guide to detect whether a part passes through the recovery guide.

In addition, in another preferred embodiment of the machine tool according to the present invention, if the part is not detected by the recovery sensor, the feed spindle may not be moved from its original position.

The machine tool according to the present invention has an effect of safely discharging parts processed by the conveying spindle part or the fixed spindle part to the outside by being organically driven by the part conveying part and the part ejecting part.

In addition, the machine tool according to the present invention is provided with a feed sensor and/or a discharge sensor to prevent the transfer spindle portion from being moved to the machining position during discharge of the part, thereby improving the safety of driving the machine tool.

In addition, the machine tool according to the present invention has an effect of preventing foreign matters, such as chips or coolants, which may occur during processing by the parts recovery part cover, door cover, and fixed housing from entering the outside.

1 shows a perspective view of a machine tool according to an embodiment of the present invention.
FIG. 2 is a view showing a fixed housing and a part discharge part removed in FIG. 1.
3 is a view showing that the feed spindle is moved from the original position to the machining position in FIG. 2 to drive the part recovery unit.
4 shows a perspective view of a conveyor according to an embodiment of the invention.
5 is a view showing a state in which the door cover is opened from the inside of the door housing according to an embodiment of the present invention.
6 is an enlarged view of a part discharge part shown in FIG. 1.

Hereinafter, with reference to the drawings of the machine tool according to an embodiment of the present invention will be described in detail. The embodiments introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. In addition, in the drawings, the size and thickness of the device may be exaggerated for convenience. Throughout the specification, the same reference numbers indicate the same components.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification. The size and relative size of layers and regions in the drawings may be exaggerated for clarity of explanation.

The terminology used herein is for describing the embodiments, and thus is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, "comprise" and/or "comprising" refers to the components, steps, operations and/or elements mentioned above, the presence of one or more other components, steps, operations and/or elements. Or do not exclude additions.

1 shows a perspective view of a machine tool according to an embodiment of the present invention, FIG. 2 shows a drawing in which the fixed housing and the part discharge part are removed in FIG. 1, and FIG. 3 moves the feed spindle in FIG. 2 from the original position to the machining position It shows a drawing showing that the part recovery unit is driven, and FIG. 4 shows a perspective view of a conveyor according to an embodiment of the present invention, and FIG. 5 shows a state in which the door cover is opened inside the door housing according to the embodiment of the present invention 6 shows an enlarged view of a part discharge part shown in FIG. 1.

1 to 6, the machine tool 100 according to an embodiment of the present invention is largely a frame 110, a transfer spindle part 120, a part recovery part 130, a part transfer part 140 and a part discharge The unit 150 may be included, and the stationary spindle unit 160 and the stationary housing 170 may be further included.

1 to 3, the frame 110 is a base of the machine tool 100, and is fixed to the ground or the floor to support the remaining components.

The transfer spindle unit 120 may be disposed to be movable on the frame 110 in the forward direction, which is the original position and the processing position.

The transfer spindle unit 120 is disposed on the frame 110, the ball screw 121 rotated by the motor 122 and the transfer nut portion 123 meshed with the ball screw 121 and moved linearly And, may include a transfer spindle housing 124 disposed on the transfer nut portion 123, and a transfer spindle 125 accommodated in the transfer spindle housing 124 to rotate the base material.

The fixed spindle part 160 may be fixedly disposed on the frame 110 so as to correspond to the rotation axis of the transport spindle part 120.

In addition, the transfer spindle portion 120 may be replaced with a tailstock for fixing the free end of the base material clamped by the fixed spindle portion 160, in this case, the part recovery part 130 and the part transfer part to be described later 140 may be disposed on one side of the tailstock.

2 and 3, the part recovery part 130 may be disposed on one side of the transfer spindle part 120 to recover the part.

Specifically, the part recovery unit 130 is a part recovery unit housing 131 disposed above the transfer spindle unit 120 and the part recovery unit housing 131 is disposed inside the part to clamp the part A shaft 132 moved to be exposed to the front of the recovery unit housing 131, a part recovery unit cover 133 disposed in front of the recovery unit housing and opened when the shaft 132 is moved forward, and It may be disposed on one end of the shaft 132 may include a gripper 134 for clamping the part.

That is, the part recovery part 130 may recover the parts clamped by the transport spindle part 120 or the fixed spindle part 160 to be described later at a processing position of the transport spindle part 120.

1 to 5, the part transfer unit 140 may transfer the parts recovered from the part recovery unit 130 to the rear, which is the original position of the transfer spindle unit 120.

Specifically, the part transfer unit 140 may include a conveyor 141, a door housing 142, a door cover 143, a transfer detection sensor 144 or a transfer guide 145.

The conveyor 141 is disposed inside the part recovery part housing 131 to transfer parts, but one end may be exposed behind the part recovery part housing 131.

The door housing 142 may be disposed behind the part recovery unit housing 131 to accommodate one end of the exposed conveyor 141, or may be integrally formed with the part recovery unit housing 131, Alternatively, it may be separately manufactured and mounted.

In addition, the door housing 142 may be formed with an open surface 142a on one side to discharge the part conveyed by the part transfer part 140 to the part discharge part 150 to be described later, in which case the door The cover 143 closes the open surface 142a of the door housing 142 when the transport spindle 120 moves forward and the door housing (when the transport spindle 120 returns to its original position) The opening surface 142a of 142 may be opened.

1, 3 and 5, the mechanism of opening and closing the door cover 143 according to an embodiment of the present invention is as follows, but is not limited thereto and may be implemented by various known methods.

The present invention may further include a fixing housing 170 fixed to one side of the frame 110 in order to prevent scattering of chips or coolants generated outside during processing.

In this case, the fixed housing 170 includes a bending bracket 171 bent in the direction of the transfer spindle 120 on one side, and the door cover 143 is opened and closed by the bending bracket 171. Can.

Specifically, the door cover 143 has a protrusion 143a protruding outward so as to be placed in the bending bracket 171 when the transfer spindle 120 returns to the original position from the machining position, and one end of the door housing The door cover 143 is disposed on the door cover 143 when the transfer spindle portion 120 is moved to the machining position by being disposed on the 142 and the other end disposed on the door cover 143. It may include an elastic member 147 to provide a return force to close.

The elastic member 147 may be implemented as a coil spring.

Therefore, when the transfer spindle is in the processing position, the door cover 143 closes the open surface 142a of the door housing 142 to prevent foreign matter from entering, and is possibly transferred by the part transfer unit 140. It is possible to prevent the damage in the machine tool 100 by preventing the discharge of parts that may be.

In addition, the part transfer unit 140 may further include a transfer detection sensor 144 disposed on the conveyor 141 to detect that the part is being transferred.

When a part is detected by the feed detection sensor 144, the feed spindle 120 may not be moved from its original position, and control and safety of the machine tool 100 by the feed detection sensor 144 This can be improved.

In addition, the transfer detection sensor 144 may be a beam sensor irradiated in a direction perpendicular to the traveling direction of the conveyor 141, or may be a photo sensor that detects an image of the transferred part.

When the transfer detection sensor 144 is electronic, a chip or coolant may be buried on the part where processing has been completed, thereby causing a malfunction of the sensor.

Therefore, the part transport part 140 further includes a transport guide 145 arranged in front of the transport detection sensor 144 on the conveyor 141 to align the transported parts, and the parts to be transported are coupled with the beam sensor. Collision can be prevented.

In addition, the transfer guides 145 are disposed on opposite surfaces of the conveyor 141, and the distance between them is formed closer to each other in the direction of the transfer detection sensor 144, thereby effectively aligning the transferred parts. At the same time, by contacting the side of the part to be transferred, it is possible to remove the coolant and the like on the surface.

In addition, the part transfer part 140 is provided with a curved portion 146 disposed on the conveyor 141 to change the direction of the part being transferred from the conveyor 141 to the open surface 142a of the door housing 142. It may further include.

The curved portion 146 may have an approximately curved shape bent from one side of the conveyor 141 to the other side.

Referring to FIGS. 1 and 6, the part discharge part 150 may have a part discharged from the part feed part 140 when the feed spindle part 120 returns to its original position.

Specifically, the part discharge part 150 is a bucket table 151 disposed in the lower direction of the opening surface 142a of the door cover 143, and a part placed on the bucket table 151 to place the part. A bucket 152 and a collection guide 153 disposed under the opening surface 142a of the door housing 142 to guide the part to be placed on the bucket 152 may be included.

The bucket table 151 may be fixed to the bottom of the frame 110 or the machine tool 100, and the bucket 152 may be detachably disposed on the bucket table 151.

The recovery guide 153 may be formed as a U-shaped plate material having an approximately upper side open.

In addition, the recovery guide 153 is a predetermined angle in the direction of the bucket 152 from the door housing 142, so that the part is safely discharged from the opening surface 142a of the door housing 142 to the bucket 152. It can be tilted and placed.

In addition, the part discharging unit 150 may further include a collection detection sensor 154 disposed on the collection guide 153 to detect whether a part passes through the collection guide 153.

If the part is not detected by the recovery detection sensor 154, the transfer spindle 120 may not be moved from the original position, and the control and control of the machine tool 100 by the recovery detection sensor 154 Safety can be improved.

Further, the recovery detection sensor 154 may be a beam sensor irradiated in a direction perpendicular to the discharge direction of the part, or may be a photo sensor that detects an image of the discharged part.

In addition, the machine tool 100 according to an embodiment of the present invention can control the machine tool 100 by simultaneously using the detection of the feed sensor 144 and the recovery sensor 154.

For example, when the transfer detection sensor 144 and the recovery detection sensor 154 are sequentially turned on, it can be determined that the discharge of the part is completed and the next processing step can be started.

However, when the transfer detection sensor 144 is turned on and the recovery detection sensor 154 is off for a predetermined time, an abnormality occurs in the part transfer part 140 or the part discharge part 150. It is determined that it has occurred, and the operation of the machine tool 100 may be stopped and an alarm may be provided to the operator.

In short, according to the present invention, foreign matters do not flow in or out due to the structure of the part transfer part 140 and the part discharge part 150, and the parts can be safely discharged to the outside to minimize the occurrence of defective products. It has the advantage of improving control and processing safety.

In the detailed description of the present invention described above, the present invention has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those skilled in the art will appreciate the invention described in the claims below. It will be understood that various modifications and changes may be made to the present invention without departing from the spirit and technical scope. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: machine tool 110: frame
120: transfer spindle portion 121: ball screw
122: motor 123: transfer nut part
124: feed spindle housing 125: feed spindle
130: parts recovery unit 131: parts recovery unit housing
132: shaft 133: parts recovery part cover
134: gripper 140: part transfer unit
141: conveyor 142: door housing
142a: open surface 143: door cover
143a: projection 144: transfer detection sensor
145: transfer guide 146: curved part
147: elastic member 150: part outlet
151: bucket table 152: bucket
153: Recovery guide 154: Recovery detection sensor
160: fixed spindle portion 170: fixed housing
171: bending bracket

Claims (12)

frame;
A transfer spindle part movably disposed on the frame in the forward direction, the original position and the processing position;
A part recovery part disposed on one side of the transport spindle to recover parts;
A part conveying part for conveying the part recovered from the part collecting part to the rear in the original position direction of the conveying spindle part; And
And a part discharge part in which the part discharged from the part feed part is placed when the feed spindle part returns to its original position.
According to claim 1,
Further comprising a fixed spindle portion is fixed to be disposed on the frame to correspond to the rotation axis of the transfer spindle portion,
The part recovery part is a machine tool capable of recovering a part processed by the fixed spindle part at a processing position of the transfer spindle part.
According to claim 1,
The parts recovery unit,
A part recovery part housing disposed on the transfer spindle part;
A shaft disposed inside the part recovery part housing and moved to be exposed in front of the part recovery part housing to clamp a part;
A part recovery part cover disposed in front of the recovery part housing and opened when the shaft is moved forward; And
And a gripper disposed on one end of the shaft to clamp a part.
According to claim 3,
The part transfer unit,
A conveyor disposed inside the part recovery part housing to transfer parts, one end of which is exposed at the rear of the part recovery part housing;
A door housing disposed on the rear side of the part recovery part housing to accommodate one end of the exposed conveyor, and having an open surface formed on one side; And
And a door cover that closes the opening surface of the door housing when the transport spindle part is moved forward and opens the open surface of the door housing when the transport spindle part returns to its original position.
According to claim 4,
Further comprising a fixed housing fixed to one side of the frame,
The fixed housing includes a bending bracket bent in the direction of the transfer spindle on one side,
The door cover is provided with a protruding portion protruding outward so as to be placed in the bending bracket when the transfer spindle portion returns to the original position from the machining position, one end is disposed in the door housing and the other end is disposed in the door cover to process the transfer spindle portion A machine tool including an elastic member that provides a return force so that the door cover closes an open surface of the door housing when moved to a position.
According to claim 4,
The part transfer part is disposed on the conveyor, the machine tool further comprises a transfer detection sensor for detecting that the part is being transferred.
The method of claim 6,
When the part is detected by the feed sensor, the machine tool does not move the feed spindle. The method of claim 6,
The transfer detection sensor is a beam sensor that is irradiated in the vertical direction and the traveling direction of the conveyor,
A machine tool further comprising a conveying guide arranged in front of the conveyance detection sensor in the conveyor to align the conveyed parts.
The method of claim 8,
The conveying guides are respectively disposed on opposite surfaces of the conveyor, and the machine tools are formed such that mutual distances are adjacent to each other toward the conveyance sensor.
According to claim 4,
The part discharge part,
A bucket table disposed in a downward direction of the open surface of the door cover;
A bucket disposed on the bucket table to place a part; And
Machine tool including;; disposed on the lower side of the open surface of the door housing to guide the parts to be placed in the bucket.
The method of claim 10,
The part discharge part is disposed on the recovery guide further comprises a recovery sensor for detecting whether the part passes through the recovery guide.
The method of claim 11,
If the part is not detected by the recovery detection sensor, the machine tool does not move the transfer spindle portion from its original position.

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